CN103022732A - Impedance matching method of antennas - Google Patents
Impedance matching method of antennas Download PDFInfo
- Publication number
- CN103022732A CN103022732A CN2011102901742A CN201110290174A CN103022732A CN 103022732 A CN103022732 A CN 103022732A CN 2011102901742 A CN2011102901742 A CN 2011102901742A CN 201110290174 A CN201110290174 A CN 201110290174A CN 103022732 A CN103022732 A CN 103022732A
- Authority
- CN
- China
- Prior art keywords
- impedance
- antenna
- matching
- integrated circuit
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Transceivers (AREA)
Abstract
The invention discloses an impedance matching method of antennas, which is used for regulating the impedance of antennas to lead the impedance to match with the impedance of radio frequency integrated circuit (RF IC). The method comprises the following steps: (1) a matching IC of an antenna is provided; (2) the use frequency band of the RF IC is obtained to obtain a frequency band signal; and (3) according to the frequency band signal, the impedance of the matching IC is adjusted to lead the antenna to achieve matching impedance. To sum up, according to the invention, the traditional matching circuit is replaced with the matching IC and the impedance of the matching IC is regulated according to the frequency band signal of the RF IC, thereby changing the resonance and the impedance of antennas to lead the antennas to achieve matching impedance.
Description
Technical field
The present invention relates to communication equipment field, relate in particular to a kind of antenna impedance of can accurately regulating and make it reach the method for matched impedance.
Background technology
In domain of communication equipment, take vehicle-mounted frequency modulation (RF Carkit) as the watershed, need RF engineer to finish the design of radio frequency integrated circuit (RF IC) on one side, another side needs the antenna works teacher to finish the design of match circuit (Matching Cicuit), and antenna is launched and when accepting electromagnetic wave signal, the characteristic impedance of Matching Cicuit that must guarantee the RF IC in radio station and antenna end is consistent, even described RF IC and Matching Cicuit realize impedance matching.Because the demand of RF IC country variant bandwidth when RF engineer designs, tends to all frequency bands are made to RF IC, when using concrete frequency band and switch switching circuit switched, thereby shorten the open difficulty of RF engineer, reduce cost.
Yet, for antenna works Shi Eryan, must be in limited space, antenna is designed to multifrequency antenna, has certain difficulty, also increased antenna works teacher's development time, for this reason, the antenna works teacher can use on stream match circuit (Matching Cicuit) antenna impedance is adjusted, and makes it reach optimization, satisfies specification or the frequency range of client definition.But, if antenna physical condition (antenna space, headroom district, components and parts are crossed near etc. on every side) deficiency utilizes match circuit to have certain limitation.
Therefore, for the problems referred to above, need a kind of new adjusting antenna impedance to make it reach the anti-method of coupling sun.
Summary of the invention
The object of the invention is to provides a kind of antenna impedance matching method for above-mentioned the deficiencies in the prior art, uses the method can accurately regulate antenna impedance and makes it reach matched impedance.
For achieving the above object, the invention provides a kind of antenna impedance matching method, impedance that be used for to regulate antenna makes the impedance matching of itself and radio frequency integrated circuit (RF IC), and it may further comprise the steps: (1) provides the matching integrated circuit (Matching IC) of an antenna; (2) obtain the service band of radio frequency integrated circuit to obtain band signal; (3) impedance according to described band signal adjusting matching integrated circuit makes antenna reach matched impedance.
As mentioned above, antenna impedance matching method of the present invention utilizes matching integrated circuit (Matching IC) to replace traditional match circuit (Matching Cicuit), and according to the band signal of radio frequency integrated circuit (RF IC), regulate the impedance of matching integrated circuit, thereby change resonance and the impedance of antenna, make it reach matched impedance.
Description of drawings
Fig. 1 is the flow chart of antenna impedance matching method of the present invention.
Fig. 2 is the structured flowchart of matching integrated circuit described in the second embodiment of the invention.
Fig. 3 is the structured flowchart of matching integrated circuit described in the third embodiment of the invention.
Each description of reference numerals is as follows among the figure:
Matching integrated circuit 21 switch switching circuit 22
Matching integrated circuit 31 variable capacitance inductance controllers 32
Embodiment
By describing technology contents of the present invention, structural feature in detail, realized purpose and effect, below in conjunction with execution mode and cooperate that accompanying drawing is detailed to give explanation.
With reference to figure 1, antenna impedance matching method 100 of the present invention, impedance that be used for to regulate antenna 200 makes the impedance matching of itself and radio frequency integrated circuit (RF IC), and it may further comprise the steps: (11) provide the matching integrated circuit of an antenna; (12) obtain the service band of radio frequency integrated circuit to obtain band signal; (13) impedance according to described band signal adjusting matching integrated circuit makes antenna reach matched impedance.
In preferred the first embodiment, described step (3) is specially: the secondary that produces during according to the main resonance frequency of antenna or its resonance, three times, four times be until N oblique wave, obtains matched impedance in conjunction with the intrinsic impedance of described matching integrated circuit.For example, if antenna 200 is GSM850 resonance, if switching GSM900, radio frequency integrated circuit (RF IC) uses, since the dominant frequency of GSM850 from GSM900 very close to, therefore utilize the dominant frequency of the GSM850 matching integrated circuit (Matching IC) of arranging in pairs or groups to realize impedance matching, so that the characteristic impedance of described antenna 200 is consistent with the characteristic impedance of radio frequency integrated circuit (RF IC).If switching GSM1800, radio frequency integrated circuit (RF IC) uses, since the secondary oblique wave of GSM850 from GSM 1800 very close to, therefore utilize the secondary oblique wave of the GSM850 matching integrated circuit (Matching IC) of arranging in pairs or groups to realize impedance matching, so that the characteristic impedance of described antenna 200 is consistent with the characteristic impedance of radio frequency integrated circuit (RF IC).
With reference to figure 2, in preferred the second embodiment, described matching integrated circuit 21 is formed by several match circuit set of different frequency bands, one switch switching circuit 22 is provided in step (3), switches the impedance of matching integrated circuit 21 so that antenna 200 reaches matched impedance according to described switch switching circuit 22.Wherein, several match circuits are respectively the match circuit of GSM850 frequency band, the match circuit of GSM900 frequency band, the match circuit of DCS 1800 frequency bands, the match circuit of PCS1900 frequency band and the match circuit of WCDMA2100 frequency band.
With reference to figure 3, in preferred the 3rd embodiment, described matching integrated circuit 31 is the PI type circuit that variable capacitance and variable inductance (L/C) form, one variable capacitance inductance controller 32 is provided in step (3), and the capacitance of variable capacitance and variable inductance and inductance value are so that antenna 200 reaches matched impedance in the described matching integrated circuit 31 of described variable capacitance inductance controller 32 controls of foundation.
Referring to figs. 1 to Fig. 3, when the present invention carries out the impedance matching of antenna, gather service band that receiving unit obtains radio frequency integrated circuit to obtain band signal by one first, regulate the impedance of matching integrated circuit until till described antenna reaches matched impedance by a central control unit again.
Above disclosed only is preferred embodiments of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to claim scope of the present invention still belongs to the scope that the present invention is contained.
Claims (5)
1. antenna impedance matching method, the impedance that is used for regulating antenna make the impedance matching of itself and radio frequency integrated circuit, it is characterized in that, may further comprise the steps:
(1) provides the matching integrated circuit of an antenna;
(2) obtain the service band of radio frequency integrated circuit to obtain band signal;
(3) impedance according to described band signal adjusting matching integrated circuit makes antenna reach matched impedance.
2. antenna impedance matching method as claimed in claim 1, it is characterized in that: described step (3) is specially: the secondary that produces during according to the main resonance frequency of antenna or its resonance, three times, four times be until N oblique wave, obtains matched impedance in conjunction with the intrinsic impedance of described matching integrated circuit.
3. antenna impedance matching method as claimed in claim 1, it is characterized in that: described matching integrated circuit is formed by several match circuit set of different frequency bands, in step (3), provide a switch switching circuit, switch the impedance of matching integrated circuit so that antenna reaches matched impedance according to described switch switching circuit.
4. antenna impedance matching method as claimed in claim 3, it is characterized in that: described several match circuits are respectively the match circuit of GSM850 frequency band, GSM900 frequency band, DCS 1800 frequency bands, PCS1900 frequency band and WCDMA2100 frequency band.
5. antenna impedance matching method as claimed in claim 1, it is characterized in that: described matching integrated circuit is the PI type circuit that variable capacitance and variable inductance form, one variable capacitance inductance controller is provided in step (3), controls the capacitance of described variable capacitance and variable inductance and inductance value so that antenna reaches matched impedance according to described variable capacitance inductance controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102901742A CN103022732A (en) | 2011-09-23 | 2011-09-23 | Impedance matching method of antennas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102901742A CN103022732A (en) | 2011-09-23 | 2011-09-23 | Impedance matching method of antennas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103022732A true CN103022732A (en) | 2013-04-03 |
Family
ID=47971021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102901742A Pending CN103022732A (en) | 2011-09-23 | 2011-09-23 | Impedance matching method of antennas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103022732A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105099582A (en) * | 2015-07-20 | 2015-11-25 | 联想(北京)有限公司 | Load setting method and system |
| US20170041715A1 (en) * | 2015-07-16 | 2017-02-09 | Knowles Electronics (Beijing) Co., Ltd. | Speaker with coil antenna |
| CN106856513A (en) * | 2015-12-07 | 2017-06-16 | 小米科技有限责任公司 | A kind of terminal with communication function |
| CN107359885A (en) * | 2016-05-10 | 2017-11-17 | 络达科技股份有限公司 | Impedance detection and adjustment circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101465679A (en) * | 2007-12-20 | 2009-06-24 | 启碁科技股份有限公司 | Wireless signal transmitting/receiving device and relevant device |
| CN101785016A (en) * | 2007-08-13 | 2010-07-21 | 康宁光缆***有限公司 | Antenna systems for passive RFID tags |
| CN101803215A (en) * | 2007-09-10 | 2010-08-11 | 高通股份有限公司 | Common mode signal attenuation for a differential duplexer |
| CN201805459U (en) * | 2010-09-17 | 2011-04-20 | 惠州Tcl移动通信有限公司 | Mobile phone device |
| CN102196205A (en) * | 2010-03-15 | 2011-09-21 | 华硕电脑股份有限公司 | Differential antenna and circuit control system of digital television |
-
2011
- 2011-09-23 CN CN2011102901742A patent/CN103022732A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101785016A (en) * | 2007-08-13 | 2010-07-21 | 康宁光缆***有限公司 | Antenna systems for passive RFID tags |
| CN101803215A (en) * | 2007-09-10 | 2010-08-11 | 高通股份有限公司 | Common mode signal attenuation for a differential duplexer |
| CN101465679A (en) * | 2007-12-20 | 2009-06-24 | 启碁科技股份有限公司 | Wireless signal transmitting/receiving device and relevant device |
| CN102196205A (en) * | 2010-03-15 | 2011-09-21 | 华硕电脑股份有限公司 | Differential antenna and circuit control system of digital television |
| CN201805459U (en) * | 2010-09-17 | 2011-04-20 | 惠州Tcl移动通信有限公司 | Mobile phone device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170041715A1 (en) * | 2015-07-16 | 2017-02-09 | Knowles Electronics (Beijing) Co., Ltd. | Speaker with coil antenna |
| CN107852548A (en) * | 2015-07-16 | 2018-03-27 | 奥音科技（北京）有限公司 | Loudspeaker with voice coil loudspeaker voice coil antenna |
| CN105099582A (en) * | 2015-07-20 | 2015-11-25 | 联想(北京)有限公司 | Load setting method and system |
| CN106856513A (en) * | 2015-12-07 | 2017-06-16 | 小米科技有限责任公司 | A kind of terminal with communication function |
| CN107359885A (en) * | 2016-05-10 | 2017-11-17 | 络达科技股份有限公司 | Impedance detection and adjustment circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105514624B (en) | A kind of mobile terminal antenna system and mobile terminal | |
| US9905910B2 (en) | Electronic device and multi-band antenna | |
| US9647630B2 (en) | Antenna impedance matching apparatus, semiconductor chip, and method | |
| CN101562460B (en) | Wireless receiving and emitting device of mobile communication terminal | |
| EP2451243A1 (en) | Multi-antenna radio transceiving device | |
| CN201773945U (en) | Mobile terminal antenna | |
| CN104362425B (en) | A kind of mobile terminal of shared NFC antenna | |
| US9972908B2 (en) | Capacitively coupled loop inverted F reconfigurable antenna | |
| CN102496787B (en) | Broadband direction diagram reconfiguration antenna system of integrated frequency domain filtering | |
| CN106207372A (en) | Mobile device and manufacture method thereof | |
| MX2014013713A (en) | Method for intelligently switching on/off mobile terminal antenna and corresponding mobile terminal. | |
| CN105720380B (en) | Adjustable multi-band antenna and antenna debugging method | |
| CN105305067A (en) | Antenna system and mobile terminal | |
| CN104377444B (en) | A kind of mobile terminal broad-band antenna carrying out impedance matching using tunable capacitor | |
| CN103928751A (en) | Mobile phone and antenna thereof | |
| CN110085994A (en) | A kind of adjustable antenna and terminal | |
| CN103904433A (en) | Tunable multi-band antenna and wireless communication device | |
| CN105322917A (en) | A 30MHz-512MHz wide frequency band frequency hopping filter | |
| CN103001006A (en) | Broadband mobile phone antenna with parasitic antenna and mobile phone | |
| CN106876990B (en) | A kind of antenna and mobile terminal of mobile terminal | |
| CN103022732A (en) | Impedance matching method of antennas | |
| CN103633419A (en) | Mobile device | |
| CN104466361A (en) | Mobile phone and antenna thereof | |
| CN105337051A (en) | Terminal equipment and built-in antenna with reconfigurable frequency for terminal equipment | |
| CN203826539U (en) | Tunable broadband multi-frequency built-in antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130403 |